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Video conferencing and telepresence adoption

Telepresence will see the fastest adoption among all the enterprise video conferencing technologies. That's because enterprises see the life-sized video conferencing option as a suitable replacement for in-person meetings. While telepresence implementation can cost as much as $250,000 to $300,000 for a telepresence room, the return on investment (ROI) from slashing travel expenses alone can be worth the money, according to Nemertes Research.

Desktop video conferencing is much less expensive and can reach many more employees across the enterprise. However, the quality is still not great. Vendors are working swiftly to address this problem -- and also to make desktop video applications interoperable with telepresence solutions.

Networking for enterprise video conferencing solutions

Video stresses network resources more than any other application. That's because quality video conferencing demands lots of bandwidth and requires almost no latency. Video conferencing can operate with as little as 400 Kbps of network traffic but may operate as high as 4 Mbps or even 6 Mbps of network traffic per call.

The wide area network WAN is a critical component of the infrastructure supporting video conferencing and must be properly configured in order to ensure high-quality video conferencing service delivery. The network designer must first determine the bandwidth of each video call by comparing the different resolution and frame rates available and determining which settings are best for the business application. The network designer must then determine the number of concurrent calls from each WAN-connected location. The call rate multiplied by the number of concurrent calls will determine the bandwidth requirement on each network access link.

But beyond building more capacity, there are a number of steps involved in ensuring that a WAN can support quality enterprise video conferencing. Network managers must classify traffic and then use prioritization techniques to ensure stability. They must also implement monitoring and service level measurement for video systems.

Networking alternatives for enterprise video conferencing

Not every enterprise can afford to invest in a dedicated video conferencing network with complex WAN management techniques for telepresence. That's when they turn to smaller-scale video conferencing over the Internet. While multiscreen telepresence systems can require 3 or 4 megabit pipes per screen, smaller-scale high-definition video can be done at a much lower speed.

Enterprise video conferencing interoperability is all about standards

Video conferencing and standards define how video and audio are encapsulated for transport. They also determine how video is captured by endpoints. Some companies offer proprietary encapsulation approaches, boasting better quality. Meanwhile, other companies aim to use similar standards so that systems can interoperate. One potential common approach could be the High Efficiency Video Coding (HEVC) standard, known as H.264, which is under development by the ISO. Video conferencing systems vendors will have to adapt to support similar frame rates and encapsulation methods for real interoperability between systems.

SIP-based video conferencing for unified communications integration

Session Initiation Protocol (SIP) provides a common signaling language by which endpoints can find one another and initiate and terminate rich media sessions. That's true across voice, video or instant messaging. SIP is comprised of two protocols -- SIP for initiating and terminating a session between endpoints, and the Session Description Protocol (SDP) for defining the type of session (e.g., voice or video) and session parameters such as codecs or encryption.

Because SIP is common among media types, it is a crucial element in integrating video with other collaboration tools. One example would be the ability to use a presence application with video, so that users can see when others are in a video conference or conference goers can request others to join meetings as they occur. SIP also aids in the interoperability of differing video conferencing systems across enterprises.

Video conferencing and the wireless LAN

As wireless LAN becomes a core access technology in many enterprises, video -- especially desktop video conferencing -- will need to travel over Wi-Fi. That means that enterprises must build wireless LAN architectures that best support video -- and that IT organizations learn network management techniques that better enable video over Wi-Fi.

IT shops planning to run video over the wireless LAN must learn wireless traffic prioritization techniques, as well as how to manage multicast and unicast video streams in the wireless environment.

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